用粒子群算法处理带约束问题，处理约束条件使用的是罚函数法，代码中附有中文注释，txstA.txt文件是约束函数的系数组成的矩阵(Particle swarm algorithm is applied to deal with the constrained problem. The penalty function is applied to deal with the constraint condition. The code is accompanied by Chinese annota